Annotation of embedtools/src/clog.c, revision 1.1.2.7
1.1.2.1 misho 1: #include "global.h"
2: #include "clog.h"
3:
4:
1.1.2.7 ! misho 5: int Verbose;
1.1.2.1 misho 6: extern char compiled[], compiledby[], compilehost[];
7:
8:
9: static void
10: Usage()
11: {
12:
13: printf( "cLOG is tool for managment syslogd operation with circular logs\n"
14: "=== %s === %s@%s ===\n\n"
15: " Syntax: clog [options] <file.log>\n\n"
1.1.2.7 ! misho 16: "\t-v\t\tVerbose, more -vv more verbosity\n"
1.1.2.1 misho 17: "\t-i\t\tInit file.log, create and prepare for use\n"
18: "\t-s <size>\tUse with init for set needed file.log size\n"
1.1.2.5 misho 19: "\t-f\t\tStay in foreground for read from file.log\n"
1.1.2.1 misho 20: "\n", compiled, compiledby, compilehost);
21: }
22:
1.1.2.3 misho 23: static int
24: initlog(const char *csLog, size_t size)
25: {
1.1.2.4 misho 26: int f, ret = -1, fill = size;
1.1.2.3 misho 27: struct clogFooter cf = { 0 };
28: char buffer[BUFLEN] = { 0 };
29:
30: memcpy(&cf.cf_magic, MAGIC, sizeof cf.cf_magic);
31: cf.cf_max = size - sizeof cf;
32:
33: f = open(csLog, O_WRONLY | O_CREAT | O_TRUNC, 0666);
34: if (f == -1) {
35: printf("Error:: in open log %s #%d - %s\n", csLog, errno, strerror(errno));
36: return -1;
1.1.2.7 ! misho 37: } else
! 38: VERB(1) printf("Verbose:: Create log %s\n", csLog);
1.1.2.3 misho 39: while (fill > BUFLEN)
40: if (write(f, buffer, BUFLEN) == -1) {
41: printf("Error:: in fill log %s #%d - %s\n", csLog, errno, strerror(errno));
42: goto end;
43: } else
44: fill -= BUFLEN;
45: if (fill > BUFLEN) {
46: printf("Error:: in fill log %s uninspected result!!!\n", csLog);
47: goto end;
48: } else if (fill && write(f, buffer, fill) == -1) {
49: printf("Error:: in last fill log %s #%d - %s\n", csLog, errno, strerror(errno));
50: goto end;
51: }
52: // return to write cfooter
53: if (lseek(f, -(off_t)(sizeof cf), SEEK_END) == -1) {
54: printf("Error:: can`t set position for write footer #%d - %s\n", errno, strerror(errno));
55: goto end;
56: }
57: if (write(f, &cf, sizeof cf) == -1) {
58: printf("Error:: in footer log %s #%d - %s\n", csLog, errno, strerror(errno));
59: goto end;
60: }
61:
1.1.2.4 misho 62: ret = 0;
1.1.2.7 ! misho 63: VERB(1) printf("Verbose:: Init done.\n");
1.1.2.3 misho 64: end:
65: close(f);
1.1.2.4 misho 66: return ret;
67: }
68:
69: static int
70: readlog(const char *csLog, char m)
71: {
1.1.2.5 misho 72: int f, cx;
1.1.2.4 misho 73: size_t end;
1.1.2.5 misho 74: struct clogFooter *cf;
1.1.2.7 ! misho 75: char *buffer = NULL;
1.1.2.5 misho 76: uint32_t next, start = 0;
77: struct iovec iov[2];
1.1.2.4 misho 78: struct pollfd pfd = { 0 };
79:
80: f = open(csLog, O_RDONLY);
81: if (f == -1) {
82: printf("Error:: in open read %s #%d - %s\n", csLog, errno, strerror(errno));
83: return -1;
1.1.2.7 ! misho 84: } else
! 85: VERB(1) printf("Verbose:: Opened log %s\n", csLog);
1.1.2.4 misho 86: end = lseek(f, 0, SEEK_END);
87: if (end == -1) {
88: printf("Error:: in get size %s #%d - %s\n", csLog, errno, strerror(errno));
1.1.2.5 misho 89: close(f);
90: return -1;
1.1.2.4 misho 91: } else
92: lseek(f, 0, SEEK_SET);
1.1.2.7 ! misho 93: VERB(2) printf("Verbose(2):: Get file size %u\n", end);
1.1.2.5 misho 94: buffer = mmap(NULL, end, PROT_READ, MAP_SHARED, f, 0);
95: if (!buffer) {
96: printf("Error:: in map %s #%d - %s\n", csLog, errno, strerror(errno));
97: close(f);
98: return -1;
99: } else {
100: close(f);
1.1.2.4 misho 101:
1.1.2.7 ! misho 102: cf = (struct clogFooter*) (buffer + end - sizeof(struct clogFooter));
! 103: VERB(3) printf("Verbose(3):: Map file to address %p and footer %p\n", buffer, cf);
1.1.2.5 misho 104: }
105:
106: if (cf->cf_wrap == 1)
107: start = cf->cf_next + 1;
1.1.2.7 ! misho 108: VERB(3) printf("Verbose(3):: wrapped log? %d\n", cf->cf_wrap);
1.1.2.5 misho 109: do {
110: cx = 0;
111: while (cf->cf_lock == 1)
112: sched_yield();
113: next = cf->cf_next;
114:
115: if (start > next) {
116: iov[cx].iov_base = buffer + start;
117: iov[cx++].iov_len = cf->cf_max - start;
118: start = 0;
119: }
120: iov[cx].iov_base = buffer + start;
121: iov[cx++].iov_len = next - start;
122: start = next;
123: writev(1, iov, cx);
1.1.2.6 misho 124: if (!(m & 2))
1.1.2.5 misho 125: break;
126: if (poll(&pfd, 1, 50) == -1) {
127: printf("Error:: in poll %s #%d - %s\n", csLog, errno, strerror(errno));
128: munmap(buffer, end);
129: return -1;
130: }
131: } while (42);
132:
133: munmap(buffer, end);
1.1.2.7 ! misho 134: VERB(1) printf("Verbose:: Read done.\n");
1.1.2.5 misho 135: return 0;
1.1.2.3 misho 136: }
137:
1.1.2.1 misho 138:
139: int
140: main(int argc, char **argv)
141: {
1.1.2.2 misho 142: char ch, m = 0, szLog[MAXPATHLEN];
1.1.2.3 misho 143: size_t siz = 0;
1.1.2.1 misho 144:
1.1.2.7 ! misho 145: while ((ch = getopt(argc, argv, "hvfis:")) != -1)
1.1.2.1 misho 146: switch (ch) {
1.1.2.7 ! misho 147: case 'v':
! 148: Verbose++;
! 149: break;
1.1.2.2 misho 150: case 'i':
151: m |= 1;
152: break;
153: case 'f':
154: m |= 2;
1.1.2.6 misho 155: break;
1.1.2.2 misho 156: case 's':
1.1.2.3 misho 157: siz = strtol(optarg, NULL, 0);
1.1.2.2 misho 158: if (siz < 1) {
1.1.2.3 misho 159: printf("Error:: size is invalid %u!\n", siz);
1.1.2.2 misho 160: Usage();
161: return 1;
162: }
163: break;
1.1.2.1 misho 164: case 'h':
165: default:
166: Usage();
167: return 1;
168: }
169: argc -= optind;
170: argv += optind;
1.1.2.2 misho 171: if (m & 1 && !siz) {
172: printf("Error:: not specified size when use with init log!\n");
173: Usage();
174: return 1;
175: }
1.1.2.3 misho 176: if (m == 3) {
177: printf("Error:: can`t in same time init and force!\n");
178: Usage();
179: return 1;
180: }
1.1.2.2 misho 181: if (!argc) {
182: printf("Error:: not specified log file!\n");
183: Usage();
184: return 1;
185: } else
186: strlcpy(szLog, *argv, MAXPATHLEN);
1.1.2.1 misho 187:
1.1.2.3 misho 188: if (m & 1 && initlog(szLog, siz) == -1)
189: return 2;
1.1.2.4 misho 190: if (readlog(szLog, m) == -1)
191: return 3;
1.1.2.3 misho 192:
1.1.2.1 misho 193: return 0;
194: }
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